In:
Angewandte Chemie International Edition, Wiley, Vol. 54, No. 45 ( 2015-11-02), p. 13374-13378
Abstract:
Asperchalasine A ( 1 ), the first cytochalasan dimer featuring a unique decacyclic 5/6/11/5/5/6/5/11/6/5 ring system consisting of 20 chiral centers, was isolated from the culture broth of Aspergillus flavipes . Three biogenetically related intermediates, asperchalasines B–D ( 2 – 4 ), were also isolated. Their structures, including their absolute configurations, were elucidated using a combination of HRESIMS, NMR, ECD, molecular modeling, and single‐crystal X‐ray diffraction techniques. Compound 1 , which possesses an unprecedented 13‐oxatetracyclo[7.2.1.1 2,5 .0 1,6 ]tridec‐8,12‐dione core structure, is the first example of a dimeric cytochalasan alkaloid. The biogenetic pathways of 1 – 4 were described starting from the co‐isolated compounds 5 and 6 . More importantly, 1 induced significant G1‐phase cell cycle arrest by selectively inhibiting cyclin A, CDK2 and CDK6 in cancerous, but not normal, cells, highlighting it as a potentially selective cell cycle regulator against cancer cells.
Type of Medium:
Online Resource
ISSN:
1433-7851
,
1521-3773
DOI:
10.1002/anie.201506264
Language:
English
Publisher:
Wiley
Publication Date:
2015
detail.hit.zdb_id:
2011836-3
detail.hit.zdb_id:
123227-7
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